Display device

ABSTRACT

A display device includes: a substrate; a data line disposed on the substrate; an another data line disposed on the substrate and adjacent to the data line; a first light emitting diode including a first electrode; and a second light emitting diode including an another first electrode, wherein the first electrode partially overlaps the data line and the another first electrode partially overlaps the another data line.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefits of the Chinese Patent ApplicationSerial Number 201610809206.8, filed on Sep. 8, 2016, the subject matterof which is incorporated herein by reference.

This application is a continuation (CA) of U.S. Patent application for“Display device”, U.S. application Ser. No. 16/264,761 filed Feb. 1,2019; U.S. application Ser. No. 16/264,761 is a continuation (CA) ofU.S. Patent application for “Display device”, U.S. application Ser. No.15/695,051 filed Sep. 5, 2017; and the subject matters of which areincorporated herein by reference.

BACKGROUND 1. Field

The present disclosure relates to a display device and, moreparticularly, to a display device with improved manufacture yield.

2. Description of Related Art

With the continuous advancement of technologies related to displays, allthe display devices are now developed toward compactness, thinness, andlightness. This trend makes thin displays, such as liquid crystaldisplay devices, organic light-emitting diode display devices andinorganic light-emitting diode display devices, replacingcathode-ray-tube displays as the mainstream display devices on themarket. Applications of thin displays are numerous. Most electronicproducts for daily use, such as mobile phones, notebook computers, videocameras, still cameras, music displays, mobile navigators, and TV sets,employ such display panels.

The organic light-emitting diode (OLED) display devices has advantagesof: light weight, thin thickness, high brightness, fast response, largeviewing angle, no need for backlight, low manufacturing cost andflexibility, and is considered as a next-generation display device.

During the manufacturing process of the OLED display device, lightemitting layers capable of emitting different colors are formed by vapordepositions. However, if pixel units with different colors are tooclose, the mask used for vapor depositions has to be finer, and colormix of adjacent pixel units with different colors may be occurred.

Therefore, it is desirable to provide an OLED display device, whereinthe design of the pixel units is modified to improve the manufactureyield of the OLED display device.

SUMMARY

An object of the present disclosure is to provide a display device,wherein the manufacture yield of the display device can be improved.

In one aspect of the present disclosure, the display device comprises: afirst substrate; a data line disposed on the first substrate andextending along a data-line-extension direction; and plural pixel unitsdisposed on the first substrate. Herein, each of the plural pixel unitscomprises: a transistor disposed on the first substrate; a firstinsulating layer disposed on the transistor, wherein the firstinsulating layer comprises an upper surface, and at least a via holepassing through the first insulating layer; a first electrode disposedon the upper surface of the first insulating layer, wherein the firstelectrode electrically connects to the transistor through the via hole;a pixel defining layer disposed on the first electrode and the firstinsulating layer, wherein the pixel defining layer exposes a part of thefirst electrode to define a light emitting region; a light emittinglayer disposed on the first electrode and in the light emitting region;and a second electrode disposed on the light emitting layer. Herein, ina normal direction view of the first substrate, and in a first pixelunit of the pixel units, the via hole has a first outline on the uppersurface of the first insulating layer, and the light emitting region hasa second outline on the upper surface of the first insulating layer; andthe first outline has a first point, the second outline has a secondpoint, a minimum distance between the first outline and the secondoutline is a distance between the first point and the second point, afirst extension direction is an extending direction of a connecting linebetween the first point and the second point, an acute angle is includedbetween the first extension direction and the data-line-extensiondirection, and the acute angle is greater than or equal to 10 degreesand less than or equal to 80 degrees.

In another aspect of the present disclosure, the display devicecomprises: a first substrate; a data line disposed on the firstsubstrate and extending along a data-line-extension direction; andplural pixel units disposed on the first substrate. Herein, each of theplural pixel units comprises: a transistor disposed on the firstsubstrate, wherein the transistor comprises a first metal layer, asemiconductor layer and a second metal layer, the second metal layer isdisposed on the semiconductor layer, and the first metal layercorresponds to the semiconductor layer; a first insulating layerdisposed on the transistor, wherein the first insulating layer comprisesan upper surface, and at least a via hole passing through the firstinsulating layer; a first electrode disposed on the first insulatinglayer, wherein the first electrode electrically connects to the secondmetal layer through the via hole; a pixel defining layer disposed on thefirst electrode and the first insulating layer, wherein the pixeldefining layer exposes a part of the first electrode to define a lightemitting region; a light emitting layer disposed on the first electrode;and a second electrode disposed on the light emitting layer. Herein, ina first pixel unit of the pixel units, the via hole has a first outlineon the upper surface of the first insulating layer, and the lightemitting region has a second outline on the upper surface of the firstinsulating layer; and the first outline has a first point, the secondoutline has a second point, a minimum distance between the first outlineand the second outline is a distance between the first point and thesecond point, a first extension direction is an extending direction of aconnecting line between the first point and the second point, and thefirst extension direction is not perpendicular and not parallel to thedata-line-extension direction.

In the display device of the present disclosure, when the firstextension direction, which is belonged to an extending direction of aconnecting line defined by a minimum distance between the first outlineof the via hole and the second outline of the light emitting region onthe upper surface of the first insulating layer, is not perpendicularand not parallel to the data-line-extension direction, the connectingline between the via hole and the light emitting region is not alignedwith the data line. When the connecting line between the via hole andthe light emitting region is designed to be not aligned with the dataline, the gaps between the pixel units can be maintained; therefore, themanufacture yield of the display device can be improved.

More specifically, when the connecting line between the via hole and thelight emitting region is disposed to be perpendicular or parallel to thedata-line-extension direction (which means the first extension directionof the minimum distance between the first outline of the via hole andthe second outline of the light emitting region is perpendicular orparallel to the data-line-extension direction) and the arrangement ofthe light emitting regions in the display region is maintained, the viahole is too close to the present pixel unit or the adjacent pixel unit,the short circuit or color mix between adjacent pixel units may beoccurred, resulting in the manufacture yield of the display devicedecreased. In addition, the mask for forming the light emitting layerhas to be finer and more delicate. However, if the gaps between thelight emitting regions are increased to prevent the color mix, thenumber of the pixel units in the display region of the display devicehas to be decreased. Hence, in the display device of the presentdisclosure, by designing the connecting line between the via hole andthe light emitting region to be not aligned with the data line, themanufacture yield of the display device can be improved withoutdecreasing the number of the pixel units when the area of the displayregion is limited.

Other objects, advantages, and novel features of the disclosure willbecome more apparent from the following detailed description when takenin conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view of an OLED display device according toEmbodiment 1 of the present disclosure.

FIG. 2 is a cross sectional view of a display region of an OLED displaydevice according to Embodiment 1 of the present disclosure.

FIG. 3 is a top view showing a part of a display region of an OLEDdisplay device according to Embodiment 1 of the present disclosure.

FIG. 4 is an enlarge view of a region comprising a first pixel unitshown in FIG. 3.

FIG. 5 is an enlarge view of a region comprising a first pixel unit, asecond pixel unit and a third pixel unit shown in FIG. 3.

FIG. 6 is a top view showing a part of a display region of an OLEDdisplay device according to Embodiment 2 of the present disclosure.

FIG. 7 is a top view showing a part of a display region of an OLEDdisplay device according to Embodiment 3 of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENT

The following embodiments when read with the accompanying drawings aremade to clearly exhibit the above-mentioned and other technicalcontents, features and effects of the present disclosure. Through theexposition by means of the specific embodiments, people would furtherunderstand the technical means and effects the present disclosure adoptsto achieve the above-indicated objectives. Moreover, as the contentsdisclosed herein should be readily understood and can be implemented bya person skilled in the art, all equivalent changes or modificationswhich do not depart from the concept of the present disclosure should beencompassed by the appended claims.

Furthermore, the ordinals recited in the specification and the claimssuch as “first”, “second” and so on are intended only to describe theelements claimed and imply or represent neither that the claimedelements have any proceeding ordinals, nor that sequence between oneclaimed element and another claimed element or between steps of amanufacturing method. The use of these ordinals is merely todifferentiate one claimed element having a certain designation fromanother claimed element having the same designation.

Furthermore, the ordinals recited in the specification and the claimssuch as “above”, “over”, or “on” are intended not only directly contactwith the other substrate or film, but also intended indirectly contactwith the other substrate or film.

Embodiment 1

FIG. 1 is a cross sectional view of an OLED display device of thepresent embodiment. In the process for preparing the OLED displaydevice, a first substrate 11 and a second substrate 12 are provided.Organic light emitting diodes 15 and pixel defining layer 16 aredisposed on the first substrate 11, wherein a part of the pixel defininglayer 16 is disposed between two adjacent organic light emitting diodes15. In addition, the display device may further comprise at least aspacer 14 disposed on the pixel defining layer. In this embodiment,plural spacers 14 are disposed between the first substrate 11 and thesecond substrate 12. In this embodiment, a glue material 13 (in thepresent embodiment, a fit) is disposed adjacent to edges of the secondsubstrate 12 in advance, which is adhered onto the second substrate 12through a dispensing process and an annealing process. Next, the firstsubstrate 11 and the second substrate 12 are assembled, wherein thespacers 14 are disposed correspondingly to parts of the pixel defininglayer 16 without pixel openings 161. After a laser annealing process,the glue material 13 is adhered between the first substrate 11 and thesecond substrate 12, and the OLED display device of the presentembodiment is obtained.

In the present embodiment, the first substrate 11 and the secondsubstrate 12 can be a glass substrate, a plastic substrate, or otherflexible substrate or film, such us polyimide, but other embodiments ofthe present disclosure are not limited thereto. When the first substrate11 and the second substrate 12 are flexible substrates or films, theOLED display device is a flexible OLED display device. Furthermore, insome embodiment of the present disclosure, the OLED display device isnot equipped with the second substrate 12.

In addition, as shown in FIG. 1, the OLED display device of the presentembodiment comprises a display region AA and a border region B, whereinthe border region B is a region with circuits formed thereon, and thedisplay region AA is a region with organic light emitting diodes 15 andtransistors (not shown in the figure) formed thereon. Furthermore, inthe present embodiment, the organic light emitting diodes 15 canrespectively emit red, green or blue light, but other embodiments of thepresent disclosure are not limited thereto. For example, the organiclight emitting diodes 15 can be white organic light emitting diodes; andin this case, one of the first substrate 11 and the second substrate 12is disposed with a color filter layer (not shown in the figure).

In addition, as shown in FIG. 1, in the OLED display device of thepresent embodiment, the organic light emitting diode 15 comprises: afirst electrode 151, a light emitting layer 152 and a second electrode153 sequentially disposed on the first substrate 11. The first electrode151 electrically connects to a transistor (not shown in the figure)disposed on the first substrate 11. The pixel defining layer 16 isdisposed on a part of the first electrode 151, and a light emittingregion is defined by the pixel opening 161 of the pixel defining layer16. Herein, the organic light emitting diode 15 containing only thefirst electrode 151, the light emitting layer 152 and the secondelectrode 153 is exemplified, but the present disclosure is not limitedthereto. Other elements capable of using in the organic light emittingdiode can also be used in the organic light emitting diode of thepresent disclosure. For example, the elements such as an electrontransporting layer, an electron injection layer, a hole transportinglayer, a hole injection layer, and other layers capable of facilitatingthe transporting or combination of the holes and the electrons can alsobe used in the organic light emitting diode of the present disclosure.

Hereinafter, the structure of the pixel units on the display region AAof the first substrate in the OLED display device of the presentembodiment and a manufacturing process thereof are illustrated indetail.

FIG. 2 is a cross sectional view of a display region of the OLED displaydevice of the present embodiment. In the display device of the presentembodiment, a transistor TFT is disposed on the first substrate 11, andthe manufacturing process of the transistor TFT are briefly describedbelow. First, a first substrate 11 is provided. A semiconductor layer 21is formed on the first substrate 11, wherein the semiconductor layer 21is a polysilicon layer formed by amorphous silicon after laserannealing. However, other embodiments of the present disclosure are notlimited thereto. Next, a gate insulating layer 22, a first metal layer23 and a second insulating layer 24 are sequentially formed on the firstsubstrate 11. The first metal layer 23 is used as a gate electrode. Thegate insulating layer 22 and the second insulating layer 24 can beprepared by any insulting material such as silicon oxide or siliconnitride. However, other embodiments of the present disclosure are notlimited thereto. Then, a second metal layer 25 is formed on the secondinsulating layer 24. Herein, the second metal layer 25 of the transistorTFT further penetrates through the second insulating layer 24 and usedas a source electrode and a drain electrode. Part of the second metallayer 25 locating outside the transistor TFT further comprises a dataline 251.

Herein, the transistor TFT on the first substrate 11 is a lowtemperature polysilicon thin film transistor. However, in otherembodiment of the present disclosure, the aspect and the structure ofthe thin film transistor is not limited to the transistor TFT shown inFIG. 2. In addition, in other embodiment of the present disclosure, thecomponents of the transistor are not limited to the layers shown in FIG.2, and may comprise other layers such as a buffer layer or anotherinsulating layer to facilitate the adhesion between layers and theelectric property of the transistor. In other embodiment of the presentdisclosure, the transistor can be a bottom gate transistor, wherein afirst metal layer 23 is formed on the first substrate 11, followed bydisposing the gate insulating layer 22 and the semiconductor layer 21,and then disposing other layers.

After forming the second metal layer 25, a first insulating layer 26, afirst electrode layer 151, a pixel defining layer 16, an organic layer152 and a second electrode layer 153 are sequentially formed on thefirst substrate 11, and the organic light emitting diode 15 of thepresent embodiment is obtained. Herein, the first insulating layer 26can be prepared by any material for a planer layer, but the presentdisclosure is not limited thereto. The pixel defining layer 16 can beprepared by any insulating material such as a resin, and the pixelopening 161 for defining the light emitting region E is formed by apatterning process. The first electrode layer 151 can be a reflectiveelectrode, a transparent electrode or a semi-transparent electrode. Inthe present embodiment, the first electrode layer 151 is the reflectiveelectrode. The second electrode layer 153 can be a transparent electrodeor a semi-transparent electrode.

Herein, the reflective electrode can be, for example, an electrodeprepared by Ag, Ge, Al, Cu, Mo, Ti, Sn, AlNd, ACX, APC and so on. Thetransparent electrode can be a transparent conductive oxide electrode,such as an ITO electrode, an IZO electrode or an ITZO electrode. Thesemi-transparent electrode can be a metal thin film electrode, forexample, an Mg/Ag alloy thin film electrode, an Au thin film electrode,a Pt thin film electrode, or an Al thin film electrode. In addition, ifit is necessary, the second electrode layer 153 of the presentembodiment can be a composite electrode containing a transparentelectrode and a semi-transparent electrode, for example, a compositeelectrode of a TCO electrode and a Pt thin film electrode. It should benoted that the material of the first electrode layer 151 and the secondelectrode layer 153 are not limited thereto in other embodiment of thepresent disclosure.

In the present disclosure, the aforementioned layers can be prepared byany patterning process to form a specific pattern containing an opening.

FIG. 3 is a top view showing a part of a display region of an OLEDdisplay device of the present embodiment, wherein FIG. 2 is a crosssectional view of FIG. 3 according to the line L1-L1′, and FIG. 3 is anormal direction view of the first substrate shown in FIG. 2. As shownin FIG. 3, the display device of the present embodiment comprises pluralpixel units, for example: a first pixel unit Px1, a second pixel unitPx2, a third pixel unit Px3 and a fourth pixel unit Px4. FIG. 4 is anenlarge view of a region comprising a first pixel unit Px1 shown in FIG.3. As shown in FIG. 2 to FIG. 4, the display device of the presentembodiment comprises: a first substrate 11; a data line 251 disposed onthe first substrate 11 and extending along a data-line-extensiondirection Y; and plural pixel units (including a first pixel unit Px1, asecond pixel unit Px2, a third pixel unit Px3 and a fourth pixel unitPx4) disposed on the first substrate 11. Each of the plural pixel unitscomprise: a transistor TFT disposed on the first substrate 11, whereinthe transistor TFT comprises a first metal layer 23, a semiconductorlayer 21 and a second metal layer 25, the second metal layer 25 isdisposed on the semiconductor layer 21, and the first metal layer 23corresponds to the semiconductor layer 21; a first insulating layer 26disposed on the transistor TFT, wherein the first insulating layer 26comprises an upper surface 261, at least a via hole 262 passing throughthe first insulating layer 26; a first electrode 151 disposed on theupper surface 261 of the first insulating layer 26, wherein the firstelectrode 151 electrically connects to the second metal layer 25 throughthe via hole 262 (more specifically, parts of the first electrode 151extends into the via hole 262 and electrically connects to the secondmetal layer 25); a pixel defining layer 16 disposed on the firstelectrode 151 and the first insulating layer 26, wherein the pixeldefining layer 16 exposes a part of the first electrode 151 to define alight emitting region E; a light emitting layer 152 disposed on thefirst electrode 151 and in the light emitting region E; and a secondelectrode 153 disposed on the light emitting layer 152.

As shown in FIG. 3, in the display device of the present embodiment, oneof the pixel units is a first pixel unit Px1. As shown in FIG. 2 andFIG. 4, in the first pixel unit Px1, the via hole 2621 (which is equalto the via hole 262 shown in FIG. 2) has a first outline 2631 on theupper surface 261 of the first insulating layer 26, and the lightemitting region E1 (which is equal to the light emitting region E shownin FIG. 2) has a second outline 1611 on an upper surface of the firstelectrode 1511 (which is equal to the first electrode 151 shown in FIG.2, and the second outline 1611 on an upper surface of the firstelectrode 1511 is equal to that on the upper surface 261 of the firstinsulating layer 26). Herein, in the normal direction view of the firstsubstrate 11, the first outline 2631 has a first point P1, the secondoutline 1611 has a second point P2, a minimum distance between the firstoutline 2631 and the second outline 1611 is a distance between the firstpoint P1 and the second point P2, a first extension direction Dir1 is anextending direction of a connecting line between the first point P1 andthe second point P2, and the first extension direction Dir1 is notperpendicular and not parallel to the data-line-extension direction Y.In another embodiment of the present disclosure, an acute angle θ1 isincluded between the data-line-extension direction Y and the firstextension direction Dir1 defined by the extending direction of theconnecting line between the first point P1 and the second point P2, andthe acute angle θ1 is greater than or equal to 10 degrees and less thanor equal to 80 degrees. Herein, the acute angle θ1 is measured by theacute angle included by the first extension direction Dir1 and thedata-line-extension direction Y It should be noted that the data linecan be a linear line, a curved line or a line with a bending portion,and any data lines are fallen into the scope of the present disclosureas long as the data line has a substantial data-line-extension directionY. In the display device of the present embodiment, when the firstextension direction Dir1 defined by the connecting line with the minimumdistance between the first outline 2631 of the via hole 2621 (which isequal to the via hole 262 shown in FIG. 2) on the upper surface 261 ofthe first insulating layer 26 and the second outline 1611 of the lightemitting region E1 (which is equal to the light emitting region E shownin FIG. 2) in the normal view of the first substrate 11 is differentfrom the data-line-extension direction Y, and an acute angle is formedbetween the first extension direction Dir1 and the data-line-extensiondirection Y, the connecting line between the via hole 2621 and the lightemitting region E1 is not aligned with the data line 251. When theconnecting line between the via hole 2621 and the light emitting regionE1 is designed to be not aligned with the data line 251, the distancebetween the light emitting region E1 and the data line 251 can bemaintained; therefore, the manufacture yield of the display device canbe improved.

More specifically, when the connecting line with the minimum distancebetween the via hole 2621 and the light emitting region E1 is disposedto be perpendicular to the data-line-extension direction Y, which meansthe first extension direction Dir1 defined by the connecting line withthe minimum distance between the first outline 2631 of the via hole 2621(which is equal to the via hole 262 shown in FIG. 2) on the uppersurface 261 of the first insulating layer 26 and the second outline 1611of the light emitting region E1 (which is equal to the light emittingregion E shown in FIG. 2) is substantially perpendicular to thedata-line-extension direction Y, color mix between adjacent pixel unitsmay be occurred if the gap between the via hole 2621 (which is equal tothe via hole 262 shown in FIG. 2) and the light emitting region E1 ismaintained; and therefore, the manufacture yield of the display deviceis reduced. In addition, in the aforementioned situation, the mask forforming the light emitting layer 152 has to be finer and more delicate.It could influence the overall light emitting efficiency of the OLEDdevice. When the connecting line between the via hole 2621 and the lightemitting region E1 is disposed to be parallel to the data-line-extensiondirection Y, which means the first extension direction Dir1 defined bythe extending direction of the connecting line with the minimum distancebetween the first outline 2631 of the via hole 2621 (which is equal tothe via hole 262 shown in FIG. 2) and the second outline 1611 of thelight emitting region E1 (which is equal to the light emitting region Eshown in FIG. 2) is substantially parallel to the data-line-extensiondirection Y, the region that the first electrode can be exposedtherefrom is reduced if the arrangement of the via hole 2621 (which isequal to the via hole 262 shown in FIG. 2) in the display region ismaintained; which means the area of the light emitting region E1 isreduced, resulting in the overall light emitting efficiency is reduced.However, if the gap between the light emitting regions E1 (which isequal to the light emitting region E shown in FIG. 2) and the via hole2621 is increased to prevent the aforementioned situation, the numbersof the pixel units disposed in the display region is reduced. Hence, inthe display device of the present disclosure, when the connecting linewith the minimum distance between the via hole 2621 and the lightemitting regions E1 is not aligned with the data line 251 which meansthat the light emitting regions E1 is not aligned with the via hole2621, the manufacture yield of the display device can be improvedwithout reducing the number of the pixel units in a limited displayregion.

In addition, as shown in FIG. 4, in the present embodiment, in thenormal direction view of the first substrate, the first outline 2631 hasan arc edge. In particular, the first outline 2631 has an ellipse likeshape. Herein, a maximum width of the first outline 2631 in thedata-line-extension direction Y is defined as a first maximum width W1,a maximum width of the first outline 2631 in a direction X perpendicularto the data-line-extension direction Y is defined as a second maximumwidth W2, and the first maximum width W1 is different from the secondmaximum width W2. In another embodiment, the first maximum width W1 isgreater than the second maximum width W2; in this case, a direction ofthe long axis of the ellipse like shape of the first outline 2631 isapproximately parallel to the data-line-extension direction Y If thefirst maximum width W1 is less than the second maximum width W2, thedirection of the long axis of the ellipse like shape of the firstoutline 2631 is approximately perpendicular to the data-line-extensiondirection Y, resulting in the edge of the first outline 2631 is tooclose to the data line 251 (please refer to FIG. 3). If there is amismatch occurred in the lithography process for forming the via hole2621, a short circuit may be easily occurred.

FIG. 5 is an enlarge view of a region comprising a first pixel unit Px1,a second pixel unit Px2 and a third pixel unit Px3 shown in FIG. 3. Asshown in FIG. 2 and FIG. 5, in the display device of the presentembodiment, the second pixel unit Px2 of the plural pixel units which isadjacent to the first pixel unit Px1, and is the closest pixel unit nearto the first pixel unit Px1. In the second pixel unit Px2, the via hole2622 (which is equal to the via hole 262 shown in FIG. 2) has a thirdoutline 2632 on the upper surface 261 of the first insulating layer 26,and the light emitting region E2 (which is equal to the light emittingregion E shown in FIG. 2) has a fourth outline 1612 on the upper surface261 of the first insulating layer 26; wherein, the third outline 2632has a third point P3, the fourth outline 1612 has a fourth point P4, aminimum distance between the third outline 2632 and the fourth outline1612 is a distance between the third point P3 and the fourth point P4 inthe normal direction view of the first substrate 11, a second extensiondirection Dir2 is an extending direction of the connecting line betweenthe third point P3 and the fourth point P4, and the second extensiondirection Dir2 is different from the first extension direction Dir1defined by the extending direction of the connecting line between thefirst point P1 and the second point P2. In another embodiment of thepresent disclosure, an angle θ2 included between the first extensiondirection Dir1 and the second extension direction Dir2 is greater thanor equal to 60 degrees and less than or equal to 120 degrees.

As shown in FIG. 2, FIG. 3 and FIG. 5, in the pixel units of the displaydevice of the present embodiment, the pixel units are arranged along thedata-line-extension direction Y or/and a direction X perpendicular tothe data-line-extension direction Y. The pixel units further comprise athird pixel unit Px3, which is adjacent to the first pixel unit Px1 andlocates in the direction X (It means a connection line between a centerof the first pixel unit Px1 and a center of the third pixel unit Px3 issubstantially along the direction X). In the third pixel unit Px3, thevia hole 2623 (which is equal to the via hole 262 shown in FIG. 2) has afifth outline 2633 on the upper surface 261 of the first insulatinglayer 26, and the light emitting region E3 (which is equal to the lightemitting region E shown in FIG. 2) has a sixth outline 1613 on the uppersurface 261 of the first insulating layer 26. The fifth outline 2633 hasa fifth point P5, the sixth outline 1613 has a sixth point P6, a minimumdistance between the fifth outline 2633 and the sixth outline 1613 is adistance between the fifth point P5 and the sixth point P6 in the normaldirection view of the first substrate 11, and a third extensiondirection Dir3 is an extending direction of a connecting line betweenthe fifth point P5 and the sixth point P6. Therein, a maximum width ofthe light emitting region E1 of the first pixel unit Px1 (the secondoutline 1611) in the first extension direction Dir1 (defined by anextending direction of the connecting line with the minimum distance ofthe first point P1 and the second point P2) is defined as a thirdmaximum width W3, a maximum width of the light emitting region E3 of thethird pixel unit Px3 (the sixth outline 1613) in the third extensiondirection Dir3 (defined by an extending direction of the connecting linewith the minimum distance of the point P5 and the point P6) is definedas a fourth maximum width W4, and the third maximum width W3 isdifferent from the fourth maximum width W4.

In addition, in the present embodiment, the third pixel unit Px3 and thefirst pixel Px1 unit substantially have the same color; but the presentdisclosure is not limited thereto.

Furthermore, as shown in FIG. 3 and FIG. 5, in the present embodiment,the light emitting region E1 of the first pixel unit Px1 has an ellipselike shape in the normal direction view of the first substrate 11, andthe first electrode 151 of the first pixel unit Px1 overlaps the dataline 251. The pixel units further comprise a second pixel unit Px2 and afourth pixel unit Px4, and an area of the light emitting region E2 ofthe second pixel unit Px2 is less than an area of the light emittingregion E4 of the fourth pixel unit Px4. The second pixel unit Px2 andthe fourth pixel unit Px4 respectively locate at two sides of the firstpixel unit Px1 or the data line 251 (in other words, the data line 251is located between the second pixel unit Px2 and the fourth pixel unitPx4), the second pixel unit Px2 and the fourth pixel unit Px4 arearranged in the same row or the same column (it means a connection linebetween a center of the second pixel unit Px2 and a center of the fourthpixel unit Px4 is substantially along the data-extension-direction orperpendicular to the data-extension-direction), the first pixel unit Px1and the second pixel unit Px2 are not arranged in the same row or thesame column, and the first pixel unit Px1 and the fourth pixel unit Px4are not arranged in the same row or the same column. Herein, “one pixelunit and another pixel unit are (not) arranged in the same row or thesame column” refers to that a connection line between a center of onepixel unit and a center of another pixel unit is (not) along thedata-extension-direction or (not) perpendicular to thedata-extension-direction. The second pixel unit Px2 is adjacent to thefirst pixel unit Px1, and an extension line of a long axis of the lightemitting region E1 of the first pixel unit Px1 overlaps with the secondpixel unit Px2; wherein the fourth pixel unit Px4 is adjacent to thefirst pixel unit Px1, and an extension line of a short axis of the lightemitting region E1 of the first pixel unit Px1 overlaps with the fourthpixel unit Px4.

As shown in FIG. 5, in the present embodiment, even though both thelight emitting region E1 of the first pixel unit Px1 and the lightemitting region E3 of the third pixel unit Px3 have ellipse like shapes,the direction of the long axis of the light emitting region E1 and adirection of the long axis of the light emitting region E3 aredifferent. In particular, when the direction of the long axis of thelight emitting region E1 of the first pixel unit Px1 is different fromthe direction of the long axis of the light emitting region E3 of thethird pixel unit Px3 (in particular, the directions of the long axes ofthe light emitting region E1 of the first pixel unit Px1 and the lightemitting region E3 of the third pixel unit Px3 are directed to thesecond pixel unit Px2 with a smaller light emitting region than thefourth pixel unit Px4), the brightness of the second pixel unit Px2 canbe compensated. Therefore, the overall brightness of the display devicecan further be more even.

In the present embodiment, both the light emitting region E1 of thefirst pixel unit Px1 and the light emitting region E3 of the third pixelunit Px3 have ellipse like shapes, but the present disclosure is notlimited thereto. The light emitting region E1 of the first pixel unitPx1 and the light emitting region E3 of the third pixel unit Px3 mayhave a rectangle like shape, as long as the direction of the long axisof the light emitting region E1 and a direction of the long axis of thelight emitting region E3 are different, and the second pixel unit Px2with smaller area is overlapped with an extension line of the long axisof the rectangle like shape.

In addition, as shown in FIG. 4, in the first pixel unit Px1, in adirection perpendicular to the first extension direction Dir1, a firstgap D1 and a second gap D2 are between the second outline 1611 of thelight emitting region E1 and an adjacent edge of the first electrode1511, and the first gap D1 is different from the second gap D2.

Furthermore, as shown in FIG. 5, in second pixel unit Px2, in adirection perpendicular to the second extension direction Dir2, a firstgap D11 and a second gap D21 are also between the second outline 1612 ofthe light emitting region E2 and an adjacent edge of the first electrode1512, and the first gap D11 is different from the second gap D21.Herein, the light emitting region of the second pixel unit Px2 has arectangle like shape, and has a first edge 1612 a adjacent to the viahole 2622, a second edge 1612 b opposite to the first edge 1612 a, and athird edge 1612 c and a fourth edge 1612 d between the first edge 1612 aand the second edge 1612 b. The first gap D11 is the distance betweenthe third edge 1612 c and the adjacent edge of the first electrode 1512,and the second gap D21 is the distance between the fourth edge 1612 dand the adjacent edge of the first electrode 1512.

In addition, as shown in FIG. 4, in a direction perpendicular to thefirst extension direction Dir1, the first electrode 1511 of the firstpixel unit Px1 corresponding to the first outline 2631 has a fifth widthW5, the first electrode 1511 has a sixth width W6 between the firstoutline 2631 and the second outline 1611, and the sixth width W6 isgreater than the fifth width W5. In this case, the width of the firstelectrode 1511 is gradually increased from the first outline 2631 to thesecond outline 1611. Thus, the heat generated at the first electrode1511 between the first outline 2631 and the second outline 1611 can bedecreased. In another embodiment of the present disclosure, the firstelectrode 1511 of the first pixel unit Px1 corresponding to the secondoutline 1611 has a seventh width W7 in the direction perpendicular tothe first extension direction Dir1, and the seventh width W7 is greaterthan the sixth width W6.

Embodiments 2 and 3

FIG. 6 and FIG. 7 are respectively top views showing a part of a displayregion of an OLED display device of Embodiments 2 and 3, wherein FIG. 6and FIG. 7 are respectively a normal direction view of the firstsubstrate shown in FIG. 2. Herein, the structure of the OLED displaydevices of Embodiments 2 and 3 are similar to that of Embodiment 1,except the shapes and the positions of the first electrode, the lightemitting regions and the via holes.

A display device made as described in any of the embodiments of thepresent disclosure as described previously may be integrated with atouch panel to form a touch display device. Moreover, a display deviceor touch display device made as described in any of the embodiments ofthe present disclosure as described previously may be applied to anyelectronic devices known in the art that need a display screen, such asdisplays, mobile phones, laptops, video cameras, still cameras, musicplayers, mobile navigators, TV sets, and other electronic devices thatdisplay images.

Although the present disclosure has been explained in relation to itsembodiment, it is to be understood that many other possiblemodifications and variations can be made without departing from thespirit and scope of the disclosure as hereinafter claimed.

What is claimed is:
 1. A display device, comprising: a substrate; a dataline disposed on the substrate; an another data line disposed on thesubstrate and adjacent to the data line; a first light emitting diodecomprising a first electrode; and a second light emitting diodecomprising an another first electrode, wherein the first electrodepartially overlaps the data line and the another first electrodepartially overlaps the another data line.
 2. The display device of claim1, wherein part of the first electrode of the first light emitting diodeextends into a via hole not overlapping the data line; and part of theanother first electrode of the second light emitting diode extends intoanother via hole not overlapping the another data line.
 3. The displaydevice of claim 1, further comprising a third light emitting diode,wherein the third light emitting diode is adjacent to the first lightemitting diode along a direction perpendicular to an extension directionof the data line.
 4. The display device of claim 3, wherein a furtherfirst electrode of the third light emitting diode partially overlaps afurther data line.
 5. The display device of claim 4, wherein part of thefurther first electrode of the third light emitting diode extends into afurther via hole not overlapping the further data line.
 6. The displaydevice of claim 3, wherein a color emitting from the first lightemitting diode and a color emitting from the third light emitting diodesubstantially have the same color.
 7. A display device, comprising: asubstrate; a data line and an another data line disposed on thesubstrate; a first light emitting diode comprising a first electrode;and a second light emitting diode comprising an another first electrodeand being adjacent to the first light emitting diode, wherein the firstelectrode partially overlaps the data line and the another firstelectrode partially overlaps the another data line.
 8. The displaydevice of claim 7, wherein part of the first electrode of the firstlight emitting diode extends into a via hole not overlapping the dataline; and part of the another first electrode of the second lightemitting diode extends into another via hole not overlapping the anotherdata line.
 9. The display device of claim 7, further comprising a thirdlight emitting diode, wherein the third light emitting diode is adjacentto the first light emitting diode along a direction perpendicular to anextension direction of the data line.
 10. The display device of claim 9,wherein a further first electrode of the third light emitting diodepartially overlaps a further data line.
 11. The display device of claim10, wherein part of the further first electrode of the third lightemitting diode extends into a further via hole not overlapping thefurther data line.
 12. The display device of claim 9, wherein a coloremitting from the first light emitting diode and a color emitting fromthe third light emitting diode substantially have the same color.